Portable boring and grinding machine



April 1929. N. A. NELSON 1,708,798

PORTABLE BORING AND GRINDING MACHINE Original Filed March 2, 1922 3 sh et -sh t, 1

N. A. NELSON PORTABLE BORING AND GRINDING MACHINE April 9, 1929.

'3 Sheets-Sheet 2 Original Filed March 2. 1922 FIGZ.

FIGS.

FIG.4.'

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PORTABLE BORING AND GRINDING MACHINE Original Filed March 2. 1922 3 Shaets-Sheei umw mu ll M.

Patented Apr. 9, 1929.

EELS A. NEL$ON, 01E PORT VJASI:

PATENT OFFICE.

NGTON, WISCONSIN, ASSTGNGR, BY MESNE ASSIGN- MENTE, T SIldPLl'OITY Eli" (El-TN E 80 MANUEAGT'URHWG- IITGTQN, JVISCQNSIN, A CDRIORATIUN OF VJISCONSIN.

GOMEPANY, OF PORT WASH- PORTABL'E BORING AND GRINDING MACHINE.

Application filed. March 2 1922, Serial No. 540,567.

The invention relates to a portable boring and grindii machine.

The her and grinding machine to which the invention applies in particular has a portable frame for attachment to an en gine cylinder, a. vertical outer shaft arranged in the fre me to rotate, and slide therein and adapted to carry a tool, an inner shaft arranged in tl e outer shaft to drive a tool and to move is vertically with the outer shaft, and mechanism to rotate these shafts at different speeds and to move them vertically.

An object of the invention. is to provide a compact and etlicient machine. 15 Another object is to provide a machine which is precise in operation.

another object is to provide a machine which may be readily applied, adjusted and operated.

Another object is to provide a machine which is simple, sturdy and durable.

Another object which may be manufactured..

According to ti readily and economically 25 ie invention as it is ordinarily en'ihodied, he outer shaft is arranged in a vert. l standard, the inner shaftis carried hy the outcrshait and driven by a drive which moves along a driver as the a nner shaft iroves vertically.

he invention further provides feed inechan an which has a feed screvv arranged alone;- sit e the outer and connected thereto by a shaft carrier to support the outer and nner shafts and to move them vertically.

ii. machine in which the invention is embodied is shown in the accompanying drawin and the views therein are follows:

igr. 1 a vertical section through the is machine showing it .in operative position a cylinder block.

2 is a sectional plan view on line 2-4? 3 is a sectional plan view on line 33 at is an ehwation of a shaft carrier Ziports the tool shafts and moves lly.

section. of a modified is to provide a machine Renewed January 81, 1929.

F 6 is a vertical section through the lower part of the machine.

Fig. 7 is a sectional. plan View on line 7--7 of Fig. 6.

Fig. 8 a side View of the looking from the right of Fig.

The machine has its mechanism carried by a support or frame having a horizontal base 1 for attachment to an engine cylinder, an upright or vertical standard 2 supported by the base, and an upper frame 3 arranged upon the standard.

A rotatable and slidahle outer shaft 4: is journaled in a bez'iring in the standard and sl pper-ted therein by a feed mechanism which is arranged in the upper frame and connected to the flanged cap or head 5 of the outer shaft.

An inner shaft 6 is arranged in the outer shaft to rotate independently thereof and is supported by an antifrietionbearing 7 which rests upon the head 5 of the outer shaft and supports a pulley 8 secured to the upper end of the inner shaft.

The outer and. inner shafts are rotated simultaneously and at different speeds by a driving 9 which driven by a motor 10 arranged upon the base 1.

The driving grear 9 connected by intermediate hovel pinions l1 and 12 and a spur pinion 13 to a near 14 Which splined on the outer shaft.

The pinion 13 and the gear 14; are arranged in a recess 15 which is formed in the top of the standard and substantially closed by the base 16 of the upper frame 3 to hold gear 14 against vertical. movement and permit the outer shaft to slide therethrough.

The pulley 8 on the inner shaft is connected by a helt 17 to an elongated driving pulley 18 arranged parallel to the outer shaft and rigidly comieeted to a gear 19 which is rotated by teeth extending laterally from the rim of the gear 9.

The pulley 18 and the gear 19 are carried by a shaft 20 which is journaled in the base 16 and the top 21 of the upper frame 3.

The belt 17, will move along the pulley 18 as the inner shaft moves vertically, and the len 'th of the pulley 18 is approximately equal vertical. movement of the inner shaft-i grindin tool,

' really has a feed screw The 'feed niechanismwhich supports the outerand inner shafts and moves tli-em'verti- 7 22, whleh is supported in the upper frame alongside the outershaft,

? anda shaft carrier 23 which is threaded on the feed screw and c'onnected'tothe flange of the head by a ton-gue'and groove connection.

" 'Th'e-shaft carrier 23 has a feed nut 24'which is threaded on" the feed: screw and provided with upper and lower fiange's25 and 26 between which ashaft support 27 is carried;

' Theshaftsupport 27 has a split bearing 28 i-n which the" nut 24 isjournaled and it may have anfiarcuate groove 29 to receive the flange ofthe head 5,;as shown-in Figs. 1', 2 and4,:orjan arcuate flange 30 to-engage an screw'remains stat onary and the feed nut 24 "gi'srotatedlin'thevr'bearing 28bv one or more pins 32 which arefarr'anged in the head 5 to engage; successive teeth 33' formed on the periphery of the upper flange 25.

Rotation1of thenut24 causes it to move along1the'fe'ed'screw and feed the outer and inner shaftsdownwardly a predetermined .distancejjduring each revolution of the outer shaft;

' ally; "T

, The fe'ed screw 22 is journaled in the base 16? and' ,tlie t-op2:1 ofthe upper fr ame 3 and 'rovided' 'atii ts'. upper; end with-a hand crank 34 means ofwhic'h thefe'ed screw may be 'rotated 'to raise and lower thelshafts manuhe outer-shaft isladapted to carry either a iboring tool'or agrindingtool and has inter- I nalithreads at: its lower end for this purpose.

is'pro'vided' with a anda inner shaft, extends to drive the grinding tool -when it is attached to'th'emachine. 1

The boring tool 35 has athreaded extension 36 foriattachmentj to the lower end of the out'er shaft; and a bore 37 to. accommodate the jlowefr endof the inner shaft which performs attached to the machine:

no useful function whentlie boring tool is fBoring'cutters 38 are arrangedflradially in the lower-end ofithe boring tool and abut the conical head ofla screw 39 means of which theyemay be"adjusted:

"The grinding, tool has'a r031- 11 5a 40 which bore. 42 to which-the lower end of the V'1A bearing'43 is pivotedon and spaced from *the tool head lt) by 'a shoulderedstud 4A which'isjeecentric to the axes thereof:

" 'ficpinion45'i's carried by the lower end of theinnerfshaftfito drive an idler gear 46 rwhi eh ,is journaled on the'stu'd 44' intermedi- "Vatei-thehea'd iO and -the'bearing 43.31

r The idlergear ddrives a gear 47' arranged on one end of a shaft A8 which is journaled providedat i its other barr ge wh le I I v threaded extension d1 for. v ttachment tothe lower 'endofthe outer shaft The grinding wheel is adjustable eccentrically of the axis of the tool head by an adjusting screw 50 which is journaled in a lug 51 on the tool head 40 and threaded through a lug 52 on the bearing 43.

The standard 2 is secured by bolts 53 to a vertical flange 54 which is arranged on the base land surrounds a circular opening 55 in which a gauge ring 56 may be placed to facilitate adjustment of the boring and grinding tools.

The base 57 of the standard is counterbored to receive an annular shoulder 58 which is formed on the flange 54 to aline the standard with the opening 55.

If a. cylinder is to be both bored and ground, the boring cutters are adjusted to take a cut ofthe correct diameter and the machine. securedto the cylinder block 59 with the outer shaft 4; concentric with the cylinder 60 which standardis removed from the base, the grinding tool substituted for the boring tool, and the standard replaced.

The grinding wheel is preferably adjusted after the standard is secured to the base and lateral openings (51 are formed in the flange 54- to permit access to the grinding tool.

' The outer shaft 4: will revolve the grinding toolat a relatively slow speed to carry the grinding wheel around the wall of the cylinder, the inner shaft 6 will rotate the grinding wheel at a relatively high speed, and the feed mechanism will advance the tool through the cylinder.

The machine herein set forth may be modilied in various ways without departing from the invention embodied therein and hereafter claimed. a

' The invention is claimed as follows 1. A boring and grinding machine comprising a portable frame having a horizontal baseand a vertical standard, a rotatable and slidable outer shaft arranged in said standard, a drive to rotate said outer shaft, an in ner shaft arranged in said outer shaft to d rive a tool and carried by said outer shaft, a rotary driverarranged alongside said outer shaft, :1 drive connecting-said inner shaft and said driver and movable with said inner shaft along saiddriver, and means to move said shafts vertically. i

2 A boring and grinding machine comprising'a portable frame havinga horizontal base and a vertical standard, a rotatable and slidable outer shaft arranged in said standard and adapted to carryeither a boring tool 7 or a grinding tool'at its lowerend, a drive to rotate said outer shaft, an inner shaft arranged in said outer shaft to drive a grinding tool and carried by said outer shaft, a rotary driver arranged alongside said outer shaft, a drive connecting. said inner shaft and said driver and movable with said inner shaft along said driver, and means to move said shafts vertically.

3. A boring and grinding machine comprising a portable frame having a-horizontal base and a vertical standard, a rotatable and slidable outer shaft arranged in said stand ard, a drive connectedto said outer shaft and having. said outer shaft slidable. relatively thereto, an inner shaft arranged iii-said outer shaft to drive a tool and carried by said outer shaft, a rotary driver arranged alongside said outer shaft, a drive connecting said inner shaft and said driver and movable with said inner shaft along said driver, and means to move said shafts vertically.

4:. A boring and grinding machine comprising a portable frame having a horizontal base and a vertical standard, a rotatable and slidable outer shaft arranged in said standard, a gear splined on said outer shaft and held against vertical movement by said frame, means to rotate said gear, an inner shaft arranged in said outer shaft to drive a tool and carried by said outer shaft, a rotary driver arranged alongside said outer shaft, a drive connecting said inner shaft and said driver and movable with said inner shaft along said driver, and means to move said shafts vertically. p

5. A boring. and grinding machine comprising a portable frame having a horizontal base and a vertical standard,-a rotatable and slidable outer shaft arranged. in said: standard and adapted to carry either a boring tool or a grinding tool at its lower end, a gear splined on said outer shaft and held against vertical movement by said fran'ie, means to rotate said gear, an inner shaft arranged in said outer shaft to drive a tool andcarried by said outer shaft, a rotary driver arranged along side said outer shaft, a drive connecting said inner shaft and said driver and movable with said inner shaft along said driver, and means to move said shafts vertically.

6. A boring and grinding machine com arising a portable frame having a horizontal base and a vertical standard, a rotatable and slidable outer shaft arranged in said stand ard, a gear splined on said outer shaft and held against vertical movement by said frame, a motor carried by said frame and connected to said gear to drive the same, an inner shaft arranged in saidouter shaft to drive a tool and carried by said outer shaft, a rotary driver arranged alongside said outer shaft and driven by said motor, a drive connecting. said inner shaft and said driver and movable with said inner. shaft along said driver, and means to move said shafts vertically,

7. A boring and grinding machine comprising a portable frame having a horizontal. base and a vertical standard, a rotatable and slidable outer shaft arranged in said standard,a drive torotate said outer shaft, an inner shaft arranged in said outer shaft to drive a tool and carried by said outer shaft, a rotary driver arranged alongside said outer shaft, a drive connecting said inner shaft and said driver and movable with said inner shaft along said driver, a feed screw arranged alongside said outer shaft, a shaft carrier threaded on said feed screw and connected to said outer shaft to support the same, and means to move said shaft carrier along said feed screw and move said shafts vertically.

8. A boring and grinding machine comprising a portable frame having ahorizontal baseand a vertical standard, arotatable and slidable outer shaft arranged in said standard, a drive to rotate said outer shaft, an inner shaft arranged in said outer shaft to drive a tool and carried by said outer shaft, a rotary driver arranged alongside said outer shaft, a drive connecting said inner shaft and said driver and movable with said inner shaft along said driver, a feed screw arranged alongside said outer shaft, a shaft carrier threaded on said feed screw and connected to said oute shaft t support the same, means to move said shaft carrier automatically along said feed screw to move said shafts vertically, and a hand crank on said feed screw to rotate the same and raise or lower said shafts manually.

9. A boring and grinding macl'iine coml'JllSlllg a portable frame having a horizontal base and a vertical standard, a rotatable and slidable outer shaft arranged in said standard, a drive to rotate said outer shaft, an inner shaft arrzuiged in said. outer shaft to drive a tool and :arried by s: 'd outer shaft, a rotary driver arranged alon side said outer shaft, a drive connecting said inner shaft and said driver and. movable with sair inner shaft along said driver, a feed screw arranged alongside said outer shaft, a shaft carrier threaded on said feed screw and having a tongue and groove connection, with said. outer shai. to support the same, and means to move said shaft carrier along said feed screw and move said shafts vertically. V

10. A boring and grinding machine comprising a tubular outer shaft having independent rotary and axial movements, a retary inner shaft carried in said outer shaft to drive a tool, a rotary driver arranged parallel to said outer shaft, an inner shaft drive connecting said inner shaft and said driver and movable with said inner shaft along said driver, and means operated by said outer shaft to move said shafts axially.

11. A boring and grinding machine comprising a tubular outer shaft having independent rotary and axial movements and fiadapte'd to carry eitherfa boring toolor a grinding tool, a rotary; inner shaft carried insaidouter shaft to drive atool, a rotary driver arranged parallel togsaid outer shaft, jant'inner'shaft drive connecting said inner shaft and'said driver and movable with said inner shaft along said driver,

and means operated by outer shaft to move said shafts axially. '10

12A metal' vvorkingmachine comprising a vertical outershaft havlng lndependent roltary'and axial movements, a drive to rotate said outer shaft arranged in'termediate the Tends thereof and-held' against vertical movement, an independently rotatable inner shaft "carried insaid outer shaft to drive a tool,

s a rotary driverarranged parallel to said outer shaft,a"dr1veconnecting said-inner shaft and said driver and movable with said inner sh'aft'along saiddriver, andmeans' arranged alongside of and operated by said-outer shaft,

tofmove'saidishafts vertically v V I 13. A portable metal working machine comprising 'a verticalouterishaft having in- .dependent jrotary and; axial movements, a

drive to rotate saidouter shaft, an independently' rotatable inner shaft carried in said 'outer shaft to drive a tool, a rotaryidriver arranged iparallel'to'said outer shaft,a drive connectingsaid inner shaft and said driver and movable withsaid inner shaft along said driver, a feed screw arranged alongside said i: 1 outer shaft, a shaft carrierthreaded on said 1 feed 'serevvand connected to said outer shaft to, support the same, and means operated by said outer' shaft to, move said shaft support along 'saidfeed screw and move said shafts vertically, I

14. metal Working machine comprising a taryidriv'er arrangedparallel" to said outer shaft along said driver, afeed screw arranged alongside? said; outerfshaft, 1 a shaftcarrier Y threaded 10 n said-feed screw an having a tongueand groove f'c'onnection with sa'i'd'outer shaft to support the same, and means to move sa d shaft carrler-along said feed screw and U v move said shafts vertically. r

' prising alportableframe having a horizontal ('15, A boring, and. grinding machine com- 7 base" verticalstandard, a rotatable slidable outer shaft arranged in said stand-- s it; I and, said ll ovikbleivvith inner shaft along saiddr ver, and means operated ard,"adriveztorrotate said outer shaft, anin-r ner shaft 1 arranged in said outer shafttto drive a; tool and earriedby said'outer shaft, a rotaryfdriverarra'nged alongside said outer drive" connecting, said inner shaft feed screw to: feed said outer by said outer shaft to move said shafts vertically;

drive connecting said inner shaft and said driver and movable with said inner shaft along said driver, and means operated by said outer shaft to move said shafts vertically;

17. A. boring and grinding machine comprising a portable frame having a horizontal baseand a vertical standard, a rotatable and slidable outer shaft arranged in said standard, a drive to rotate said outer shaft, an inner shaft arranged in said outer shaft to drive a tool and carried by said .outer shaft, a rotary driver arranged a o ngside said outer shaft, a drive connectingsaid inner shaft and saiddriver and movable with said inner shaft along said'driver, a feed screw arranged alongsidesaid outer shaft, a feed nut threadedon said feed screw, a shaft support carried by said'nut and connected to said outer shaft to support the same, and means to rotate saidnut and move the same along said shaft downwardly. t

18. A boring and grinding machine comprising a portable frame having a horizontal base and a vertical standard, a rotatable and slidable outer shaft arranged in said standard, a'drive to rotate said outer shaft,

an inner shaft arranged in said outer shaft to drive a tool and carried by'said outer shaft, a rotary driver arranged alongside said outer shaft, a drive connecting said inner shaft and saiddriver and movable with said inner shaft along said driver, a feed" screw arranged alongside said outer shaft, a feed nut thread edon said feed screw, a shaft support carried by'said' nut and connected to said outer shaft to support the same, and means operated by said outer shaft to rotate said nut and move the same along said feed screw to feed said outer shaft downwardly.-

19. A boring and grinding machine comprisinga portable frame having a horizontal base and a vertical standard, a rotatable and slidableouter shaft arranged in said standard, a drive to rotate said outer shaft, an inner shaftarranged 1n sald outer shaft to drive a tool and carried by said outer shaft,

a rotary driver arranged alongside'said outer shaft, a drive connecting said inner shaft and said driver and movable with said inner shaft along said driver, a feed screw arranged alongside-said-outer shaft, a feed nut threaded on said feed screw, a shaft support carried by said nut and connected to said outer shaft to support the same, a toothed Wheel arranged on said nut, and a pin carried by said outer shaft to engage successive teeth of said Wheel and rotate the same as the outer shat't rotates to Feed said outer shaft donor W a rd ly.

20. A. boring and grinding machine comprising a portable frame having a horizontal base and a vertical standard, a rotatable and slidab e outer shaft arranged in said standard and adapted to carry a tool, a drive to rotate said outer shai't, an inner shajtt arranged in said outer shaiit to drivea tool and. carried by said outer shaft, a rotary driver arranged alongside said outer shaft, a drive connecting said inner shaft and said driver and movable with said inner shaftalong said driver, a feed screw arranged alongside said outer shaft, a feed nut threaded on said :ieed screw, a shaft support jourualed on said nut and having a tongue and groove connection with said outer shait t support the same, a toothed Wheel arranged on said nut, and a pin carried by said outer shaft to engage successive teeth of said Wheel and rotate the same as the outer shaft rotates to feed said miter shaft downwardly.

In Witness Whereol I have hereunto subscribed my name.

NELS A. NELEiON. 

